Mined for quartzite, Granham’s Moor is SSSI of national geological importance, being the one of two places in Wales and the Welsh Borderland showing a transition from the Tremadoc to the Arenig series (Cambrian and Ordovician strata), and one of the only sites in which this transition can be seen with trilobite-bearing facies.

On the north of the track is a fairly large 19th to early 20th century quarry.
To the south of the track is another quarried rock face, some concrete foundations which look like possible loading bays of some sort and a reservoir with concrete dam. This quarry was connected by an inclined rail to the Snailbeach District Railway - there is no surviving evidence of this.

Listed in the 1896 official list of quarries although it was ‘not worked’ that year.
It was listed as a sandstone quarry, having Percy Rowson of Snailbeach as owner.
The quarry was reopened before 1905 and one of two fatalities recorded here was in 1906. By 1917 it was a large quarry employing 34 persons under the Granham Moor Quarry Co. The quarry is thought to have closed shortly after the First World War.

Easily accessible site either side of a forestry commission track.